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长期从事汽车故障诊断技术和电控柴油机故障诊断技术研究,山东交通电台交通音乐之声FM101.1汽车栏目嘉宾,《汽车维修与保养》、《汽车与驾驶维修》等杂志特约撰稿,中国汽车维修技术总监俱乐部资深委员,《慧聪汽车维修保养网》汽车检测设备专家!欢迎加入技术交流QQ群：
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blogAbstract:'P0A00 Motor Electronics Coolant Temperature Sensor Circuit P0A01 Motor Electronics Coolant Temperature Sensor Circuit Range/Performance P0A02 Motor Electronics Coolant Temperature Sensor Circuit Low P0A03 Motor Electronics Coolant Temperature Sensor Circuit High P0A04 Motor Electronics Coolant Temperature Sensor Circuit Intermittent P0A05 Motor Electronics Coolant Pump Control Circuit/Open ',
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{list wl as x}{/list}Tweets From the Editor(different than @GreenCarCongres headlines in horizontal menu)
Volkswagen to implement cylinder deactivation in 4-cylinder 1.4 TSI engines in 2012
2 September 2011
Cylinder deactivation (Zylinderabschaltung, ZAS) relies upon two different profiles on the cam pieces: a conventional full profile and a zero-lift cam that is activated (right) under cylinder shut-off. Click to enlarge.
Volkswagen will
cylinder deactivation (cylinder shut-off) technology in the new 1.4-liter TSI turbocharged, direct-injection engine beginning in 2012. Volkswagen is the first carmaker to implement this technology in a turbocharged four-cylinder engine in large-scale production.
The primary goal of the system is to reduce significantly fuel consumption by temporarily shutting off two of the four cylinders (cylinders 2 and 3) dur Volkswagen says that cylinder shut-off reduces fuel consumption of the 1.4 TSI by 0.4 liter per 100 km in the NEDC driving cycle. When the Stop/Start functionality is integrated, which deactivates the engine in neutral gear, the savings effect adds up to about 0.6 liter per 100 km.
The new 1.4 TSI outputs 103 kW (140 PS, 138 hp), with 250 N&m (184 lb-ft) of torque between 1,500 and 4,000 rpm.
The greatest benefits of the technology are realized while driving at constant moderate speeds.
At 50 km/h (31 mph), in third or fourth gear, savings amount to nearly one liter per 100 km. Even when running on two cylinders, the 1.4 TSI&with its excellent engine balance&is still very quiet and low in vibration, Volkswagen says.
Cylinder shut-off is active whenever the engine speed of the 1.4 TSI is between 1,400 and 4,000 rpm and its torque is between 25 and 75 N&m (18&55 lb-ft). This applies to nearly 70% of the driving distance in the EU fuel economy driving cycle. As soon as the driver presses the accelerator pedal sufficiently hard, cylinders 2 and 3 are reactivated unnoticed.
Under the deactivation process, the combustion chambers are filled with air&this entrapped fresh air leads to minimal cylinder pressure and therefore to lower energy consumption. Afterwards, the system closes the intake and exhaust valves of cylinders 2 and 3; engine ignition only occurs once per crankshaft revolution. The pistons of the deactivated cylinder are now dragged by the crankshaft. On the other hand, efficiency increases in the two active cylinders, because their operating points are shifted to higher loads.
The valves are closed using a complex set of actuators: on both the intake camshaft and the exhaust camshaft, there are two adjustable sleeves (cam pieces) that are placed on special tooth systems. They are responsible for the eight valves of the second and third cylinders. At the ends of each cam piece, there are two different profiles adjacent to one another: a conventional full profile and a so-called zero-lift cam. The full profiles actuate the roller cam followers, which in turn actuate the valves in four- that is, they behave like very conventional cams. However, the zero-lift cams rotate over the followers&i.e. they do not actuate them&and the valve springs hold the valves shut. Engine management simultaneously shuts off fuel injection.
Spiral-shaped slots are milled in the outer surfaces of the these slots permit shifting the sleeves a few millimeters along the when electromagnetic actuators in the valve cover get a signal from the engine controller, two integrated metal pins engage the slots from outside and move them to their end positions. Finally, the cam pieces are locked in place by spring-loaded balls. As soon as the driver presses the accelerator pedal sufficiently, cylinders 2 and 3 are reactivated.
All mechanical switch-over processes are executed within one-half they last between 13 and 36 milliseconds, depending on engine speed. These processes are smoothed by accompanying interventions in ignition and throttle valve control.
Volkswagen utilizes information from the gas pedal sensor to detect the driver’s mode of driving. If the driving exhibits a non-uniform pattern&e.g. while driving in roundabout traffic or in a sporty style on a country road&shut-off functionality is suppressed.
The components for cylinder shut-off weigh a total of just over 3 kilograms. Their actuators, the camshafts and their bearing carriers are integrated in the valve cover. Two roller bearings reduce the friction of the shafts.
2, 2011 in , ,
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| BioAge Group相关推荐职位
基本信息：
汇报对象：Maintenance MGR
下属人数：0人
所属行业：
汽车/摩托车
所属部门：Maintenance Engineer
企业性质：外商独资·外企办事处
企业规模：500-999人
职位描述：
岗位职责：Keeps equipment running effectively. Perform debug/installation/maintenance and repair work to secure manufacturing equipment running with low downtime. Troubleshooting and problem solving for the equipments timely.? Support New Product Development. Create and develop manufacturing system concepts to fulfill business needs. Work with design engineers and production to quote, specify, order, debug, receive, install, and runoff new production equipment. This includes, but is not limited to, new product lines lay out, assembly stations, work cells, test stations, material handling equipment, spare parts to localization and packaging for new products/new processes. Support the new product development process through PFMEA, DFM, SPAP, FRA, and CAPP activities to ensure safety, quality, delivery, and cost targets are met. Document procedures, processes, and best practices to support the new equipment.? Maximize Operations Production and Efficiency. Maintain the current systems and equipment through analysis, troubleshooting electrical, mechanical, automation, software and hydraulic systems as well as improvement. Perform the work needed to maximize production and efficiency. Implement/modify manufacturing processes to fulfill business needs. Work with production employees to continually improve production operations, system maintenance and design concepts through coaching, equipment design/modification/selection, training, and participation in PPI activities. Communicate and assist the manufacturing aspects of the current production operations. Assign and/or perform the work needed to maximize production and efficiency. May supervise Engineering Technicians and ME Interns.? Upgrade Material and Equipment. Work with advanced engineering and equipment suppliers to determine designs and configurations for new equipment and upgrades in conformance with company specifications and quality standards. Preparation of financial analysis for capital expenditures for tooling and equipment needed in support of existing product lines or processes. Monitor and control all phases of new equipment construction from design approval though implementation on factory floor and control equipment costs during this process.? Demonstrate Project Management and Technical Expertise. Demonstrate your technical expertise in project management including, scheduling, tracking, team assignments, allocation of resources, status reports, facilitate effective problem solving, “selling” of new and innovative concepts. Technical resource for specific manufacturing methods and/or philosophies. Contribute significant technical support for large scale projects and existing manufacturing operations.? Collaborate with Other Departments. Interface between Design and Production to ensure designs are acceptable for manufacturing, equipment is designed in accordance with the designs presented and the equipment will work with the equipment we currently have. Work with peers and other support personnel with specifics to training on production equipment, problem solving, and preventive maintenance.? Strong Team Player and Contributor. Able to work well with colleagues and produce results within a fast-paced and high pressure atmosphere. Combine strong attention to detail with an orientation towards results/execution.? Continuous Improvement. Develop and drive longer term initiatives and projects for continuous and step function improvement in key performance metrics related to safety, quality and profitability.任职资格：? Associates Degree or above in Mechanical Design, Manufacturing and Automation or Hydraulic or Industrial Engineering required.? Minimum of 5 years experience working in an organization that has successfully used one or more continuous improvement methodologies (lean manufacturing, six sigma, etc.).? Proficiency in philosophy and techniques of several of the following: cellular manufacturing, equipment maintenance, self-directed work teams, problem solving, 5S, pull systems, mistake proofing, SMED, Kaizen, change management, ergonomics, TQM, learning organizations.? Working knowledge of Statistical Process Control techniques.? Proficiency of electrical and mechanical equipment, such as washing machine, test ig and CNC, is able to read blueprints, wiring diagrams, and schematics, and is capable of setting up and monitoring preventive maintenance systems. Also capable of troubleshooting and performing minor repairs to equipment.? Effective problem solving, judgment, and independent thinking skills for troubleshooting, repair, and recognition of acceptable or unacceptable product quality.? Must have strong interpersonal skills to effectively communicate with other functional areas as follows: Quality Assurance, Design Engineering, Purchasing and Inventory Control, Scheduling, and Shipping/Receiving.? Able to handle frequent interruptions, meet tight deadlines, and handle conflict in an effective manner.? Experience with Microsoft Office products.
岗位要求：
学历要求：不限
性别要求：不限
语言要求：英语 + 普通话
专业要求：不限
年龄要求：30-40
工作年限：5年以上
薪酬福利：
职位年薪：10-15万
薪资构成：基本薪资
年假福利：国家标准
社保福利：国家标准
通讯交通：不确定
企业介绍：
Began with the Mercedes Active Body Control (ABC) suspension system, the business has since evolved to include a broad product portfolio of applications including cam phasing, cylinder deactivation, variable engine oil pump controls, convertible top controls, diesel emission controls and many more.
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